.The United States signed up Friday for the 2010 Shanghai World Expo,_______it the last major country to join the event.
| A．making | B．made | C．to make | D．having made |
---Why not advise Tom to join us?
---He is as ____ as his brother, who never listens to others’ opinions.
| A．mean | B．reliable | C．stubborn | D．generous |
Only when the English class began ____ that he had left his book at home.
| A．will he realize | B．he did realize | C．did he realize | D．should he realize |
---Laura calls on her teacher pretty ____, doesn’t she?
---Yes. At least three times every week.
| A．finally | B．officially | C．frequently | D．gradually |
Eby is ____ a bad stage, always picking fights with his brother for no reason at all.
| A．going over | B．going through | C．giving in | D．giving up |
---I hear that Thomas ____ his holiday in South Africa.
---Yes. He’s prepared for his trip.
| A．spent | B．has spent | C．is spending | D．was spending |